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    <title>CSS 背景色</title>
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<h1 style="background-color: DodgerBlue;">Hello World</h1>

<p style="background-color: Tomato;">
  Shanghai is one of the four direct-administered municipalities of the People's Republic of China. Welcome to Shanghai!
  The city is located on the southern estuary of the Yangtze, with the Huangpu River flowing through it.
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